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US 8,998,402 B2Granted
Printing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsKoichiro Kawaguchi, Toshiki Takeuchi, Kengo Nieda, Shigeru Toriihara
Life of this patent
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Abstract
A printing apparatus includes a print head for inkjet printing, and a guide disposed opposing the print head and configured to guide a back surface of a sheet being conveyed in a first direction. The back surface is a reverse surface of a surface being printed. The printing apparatus further includes a receiving unit disposed opposing the print head and configured to receive ink outside the sheet being conveyed, and a mechanism configured to change a position of the guide in a second direction relative to the receiving unit being fixed, according to a size of the sheet to be used. The second direction crosses the first direction.
Claims10
A printing apparatus comprising:
- a line-type print head having a nozzle array for inkjet printing extending along a first direction across a range covering a width of a sheet being used;
- a movable guide unit disposed facing the print head and configured to guide a back surface of the sheet being conveyed in a second direction perpendicular to the first direction, wherein the back surface is a reverse side of a surface being printed by the print head, wherein the guide unit has a first movable guide and a second movable guide disposed corresponding to both sides in the first direction;
- a receiving unit disposed under the guide unit and facing the print head, configured to receive ink discharged from the print head, the receiving unit extending to cover the nozzle array;
- and
- a mechanism configured to change positions of the first and the second movable guides in the first direction while the receiving unit is unmoved to change an interval between the first and the second movable guides according to a size of the sheet being used, wherein the mechanism has a first lead screw for moving the first movable guide and a second lead screw for moving the second movable guide and the first and the second lead screws are rotated independently by different motors,
- wherein, in a first state in which there is a sheet having a maximum sheet width assumed to be used, the guide unit is positioned behind the sheet and located so as not to be exposed outside the sheet while the receiving unit is exposed outside the sheet, as viewed from the print head,
- wherein, in a second state in which there is a sheet having a minimum sheet width assumed to be used, the first and the second movable guides are located so as to be exposed outside the sheet while the receiving unit is exposed between the first and the second movable guides and an edge of the sheet, as viewed from the direction of the print head, and
- wherein positions of the first and the second movable guides are set such that each of the first and the second movable guides are located at a same position in the first state and the second state.
5 more elements
A printing apparatus comprising:
- a line-type print head having a nozzle array for inkjet printing extending along a first direction across a range covering a width of a sheet being used;
- a movable guide unit disposed facing the print head and configured to guide a back surface of the sheet being conveyed in a second direction perpendicular to the first direction, wherein the back surface is a reverse side of a surface being printed by the print head, wherein the guide unit has a first movable guide and a second movable guide disposed corresponding to both sides in the first direction;
- a receiving unit disposed under the first and the second movable guides and facing the print head, configured to receive ink discharged from the print head, the receiving unit extending to cover the nozzle array;
- and
- a mechanism configured to change positions of the first and the second movable guides in the first direction while the receiving unit is unmoved to change an interval between the first and the second movable guides according to a size of the sheet being used, wherein the mechanism has a lead screw and a motor,
- wherein, in a first state in which a sheet having a first sheet width being used, the first and the second movable guides are positioned behind the sheet and located so as not to be exposed outside the sheet while the receiving unit is exposed outside the sheet, as viewed from the print head,
- wherein, in a second state in which a sheet having a second sheet width that is smaller than the first sheet width being used, the first and the second movable guides are located so as to be exposed outside the sheet while the receiving unit is exposed between the first and the second movable guides and an edge of the sheet, as viewed from the direction of the print head, and
- wherein positions of the first and the second movable guides are set such that each of the first and the second movable guides are located at a same position in the first state and the second state.
5 more elements
Dependencies are inferred from the claim text.